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Suppose that y varies inversely with x. Given x=-3 when y=-105. Find y when x is 15

Suppose that y varies inversely with x. Given x=-3 when y=-105. Find y when x is 15-example-1
User Jeffer
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1 Answer

2 votes

Answer:

The value of y is 21.

Explanation:

The formula of inversely proportional is y = k/x where k is a constant. So in order to find y, you first have to find the value of k by substituing x and y values into the formula :


y = (k)/(x)

Let y = -105,

Let x = -3,


- 105 = (k)/( - 3)


k = - 105 * - 3


k = 315

We have already found k value. Next you have to find the value of y :


y = (315)/(x)

Let x = 15,


y = (315)/(15)


y = 21

User Yuca
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